Align objects in Palette

How do you make it so that the objects in the palette are centred in one column?
eg
object 1
another one
this
Currently they are left aligned.
Thanks,
Caroline

If the SelectionObject for each item is different than the whole object, and if they are all the same size, then you could just set GoPalette.AlignsSelectionObject to true, and adjust the GridOrigin and GridCellSize appropriately.